To Stevenson and to the romanticist generally, a hansom cab-driver is a mystery behind whose apparent commonplaceness lie magic possibilities beyond all telling; not one but may be the agent of the Prince of Bohemia, ready to drive you off to some mad and magic adventure in a street which is just as commonplace to the outward eye as the cab-driver himself, but which implicates by its very deceitful commonness whole volumes of romance.

Having thus attempted to hide the deadly commonplaceness of this story with a thin layer of cynicism, perhaps even the wily editor may be tricked into taking the leap.

From the beginning his craftsmanship was perfect; from the beginning he took his subject-matter from others as he found it and worked it up into aphorism and epigram till each line shone like a cut jewel and the essential commonplaceness and poverty of his material was obscured by the glitter the craftsmanship lent to it.